SOUND AMPLIFYING HORN,申请号CAD301696-传众专利搜索

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发明名称	SOUND AMPLIFYING HORN
摘要
申请公布号	CA301696(A)	申请公布日期	1930.07.01
申请号	CAD301696	申请日期
申请人	THE KERSTEN RADIO EQUIPMENT	发明人	JACOB KERSTEN
分类号		主分类号
代理机构		代理人
主权项
地址

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